. Bulletin of the Department of Agriculture. Agriculture. j1. 907, U. S. Dept. of Agriculture. Fumigation of Citrus Plants With Hydrocyanic Acid. A, B, Fumigation injury to foliage at point of infestation with purple scale (Lepidosaphes beckii). The injury appeared most prominent on the side of the leaf opposite the in- festation. A, Upper side of leaf, showing purple scale. B, Lower side of same leaf, showing collapsed tissue opposite scale infestation. C, An immature Valencia orange injured by exposure to simshine following fumigation. The uninjured area was shaded by leaves. D, Twig fr
. Bulletin of the Department of Agriculture. Agriculture. j1. 907, U. S. Dept. of Agriculture. Fumigation of Citrus Plants With Hydrocyanic Acid. A, B, Fumigation injury to foliage at point of infestation with purple scale (Lepidosaphes beckii). The injury appeared most prominent on the side of the leaf opposite the in- festation. A, Upper side of leaf, showing purple scale. B, Lower side of same leaf, showing collapsed tissue opposite scale infestation. C, An immature Valencia orange injured by exposure to simshine following fumigation. The uninjured area was shaded by leaves. D, Twig from a fumigated tree, showmg how the leaves are ab- scissed at the base of the blade, leaving the petioles clinging to the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Department : Supt. of Docs. , Govt. Print. Off.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
